linux-toradex.git/net/mac80211/key.h, branch v3.18-rc5

mac80211: free all AP/VLAN keys at once

2013-12-16T10:29:48+00:00

When the AP interface is stopped, free all AP and VLAN keys at
once to only require synchronize_net() once. Since that does
synchronize_net(), also move two such calls into the function
(using the new force_synchronize parameter) to avoid doing it
twice.

Signed-off-by: Johannes Berg

mac80211: add generic cipher scheme support

2013-11-25T19:50:52+00:00

This adds generic cipher scheme support to mac80211, such schemes
are fully under control by the driver. On hw registration drivers
may specify additional HW ciphers with a scheme how these ciphers
have to be handled by mac80211 TX/RR. A cipher scheme specifies a
cipher suite value, a size of the security header to be added to
or stripped from frames and how the PN is to be verified on RX.

Signed-off-by: Max Stepanov 
Signed-off-by: Johannes Berg

mac80211: port CCMP to cryptoapi's CCM driver

2013-10-11T13:38:20+00:00

Use the generic CCM aead chaining mode driver rather than a local
implementation that sits right on top of the core AES cipher.

This allows the use of accelerated implementations of either
CCM as a whole or the CTR mode which it encapsulates.

Signed-off-by: Ard Biesheuvel 
Signed-off-by: Johannes Berg

wireless: move crypto constants to ieee80211.h

2013-05-16T20:39:41+00:00

mac80211 and the Intel drivers all define crypto
constants, move them to ieee80211.h instead.

Reviewed-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg

mac80211: batch key free synchronize_net()

2013-03-11T13:16:42+00:00

Instead of calling synchronize_net() for every key
on an interface or when a station is removed, do it
only once for all keys in both of these cases.

As a side-effect, removing station keys now always
calls synchronize_net() even if there are no keys,
which fixes an issue with station removal happening
in the driver while the station could still be used
for TX.

Signed-off-by: Johannes Berg

mac80211: remove underscores from some key functions

2013-03-11T13:16:41+00:00

Some key function don't exist without underscores, so
remove the underscores from those.

Signed-off-by: Johannes Berg

mac80211: clean up key freeing a bit

2013-03-11T13:16:41+00:00

When a key is allocated but not really added, there's no
need to go through the entire teardown process. Also, if
adding a key fails, ieee80211_key_link() can take care of
freeing it instead of the (only) caller.

Signed-off-by: Johannes Berg

mac80211: defer tailroom counter manipulation when roaming

2013-03-06T15:36:00+00:00

During roaming, the crypto_tx_tailroom_needed_cnt counter
will often take values 2,1,0,1,2 because first keys are
removed and then new keys are added. This is inefficient
because during the 0->1 transition, synchronize_net must
be called to avoid packet races, although typically no
packets would be flowing during that time.

To avoid that, defer the decrement (2->1, 1->0) when keys
are removed (by half a second). This means the counter
will really have the values 2,2,2,3,4 ... 2, thus never
reaching 0 and having to do the 0->1 transition.

Note that this patch entirely disregards the drivers for
which this optimisation was done to start with, for them
the key removal itself will be expensive because it has
to synchronize_net() after the counter is incremented to
remove the key from HW crypto. For them the sequence will
look like this: 0,1,0,1,0,1,0,1,0 (*) which is clearly a
lot more inefficient. This could be addressed separately,
during key removal the 0->1->0 sequence isn't necessary.

(*) it starts at 0 because HW crypto is on, then goes to
    1 when HW crypto is disabled for a key, then back to
    0 because the key is deleted; this happens for both
    keys in the example. When new keys are added, it goes
    to 1 first because they're added in software; when a
    key is moved to hardware it goes back to 0

Signed-off-by: Johannes Berg

mac80211: cleanup generic suspend/resume procedures

2013-03-06T15:35:56+00:00

Since now we disconnect before suspend, various code which save
connection state can now be removed from suspend and resume
procedure. Cleanup on resume side is smaller as ieee80211_reconfig()
is also used for H/W restart.

Signed-off-by: Stanislaw Gruszka 
Signed-off-by: Johannes Berg

mac80211: add debug file for mic failure

2012-12-05T08:44:41+00:00

The mic failure count provides the number of mic failures that
have happened on a given key (without a countermeasure being
started, since that would remove the key).

Signed-off-by: Saravana 
[fix NULL pointer issues]
Signed-off-by: Johannes Berg